Educational appliance.



A. T. McCLUER.

EDUCATIONAL APPLIANCE. APPLICATIQN 'FILED OCT. so. 915.

1,243,957. Patented Oct. 23, 1917.

f 7 V I I I V Witnesses: Invenior Attorneys.

I; %A i ANNA TAYLOR IVIQCLUER, or NEW- YORK,

n. .,nssrs1ton or ONE-Hans LEO-JOHN,

ROBERT TAYLOR, or BRO0KLYN,,1\TEW YORK.

l EDUCATIONAL ArrLIAiron.

Application filed October 30, 1915. Serial No. 58,761.

To all whom it may concern: 1 Be it known that I, ANNA TAYLOR Mo- CLonn,a citizen of the United States,residing in the borough of Manhattan,city, county, and State of New York, have invented a certain new anduseful Educational Appliance, of which the following is a specification.

My invention relates to appliances to be used in the school room tofacilitate the teaching of mathematics in its different branches. 7 1 7It is the present practice to use charts fo this purpose. Such chartsare formed ofpaper or cardboard each containing one sub ject. One chartwill contain the multiplica tion table, others examples in addition,sub'-' traction, division,-fractions, percentage, decimals, proportion,etc. This necessitates many charts which must be made by the teacher,require room for storage,.and much time is consumed in hanging thecharts on the walls and in removing and storing them.

The objects of my invention are to materially reduce the number ofcharts required, to save time in handling and reduce storage space.

"These and further objects will more fully appear in the followingspecification and ac companying drawings, considered together orseparately. y

I have illustrated myinvention in the following drawings, in which I*Figure 1 is a front elevation of my improved appliance showing thesamearranged for examples in addition.

Fig. 2 is a similar view of the dial'board with the chart removed.

Fig. 3 is a section, on an enlarged scale, taken on line 8-3 of Fig. 1.

' Fig. 4 is a horizontalsectionrof a carrying and storage case for thedevicerand 7 *Fig; 5 is'affront elevation ofa'modified form of chart. I

In thejdra'wings, in which-similar refer ence characters" designatecorresponding" parts in all the'figures, 5 designates a backing or dialboard which is preferably constructed of heavy cardboard "or otherrelativelythin material of suiiicient' strength to resist warping. Thebacking is preferably of elliptical shape and is provided along one ofits longer sides with tabs or cars 6, 6. Each of the tabs 6, has securedthereto La fitting from one side-'ofxwhich projects a pin or hook 7 andis provided on the opposite'sid'e with an eye '8 in'which is secured aring 9. In use the rings 9 are passed'over nails or. hookscarried by awall, partition or the like. The backing is provided at three: several"points [with eyelets 10, 11 and12. 4

In connection with the backing or" dial boardI provide-a series of dialsor disks 13, 1 1 and 15. Each dial: is providedat its cen' ter with. aneyelet 16." In the present embodiment of my invention the disk 13 hasdesignated thereon varioussigns denoting arithmetical operations, suchas the signs indicating addition, multiplication, division, the decimalpoint, 95, etc. This dial is secured to the dial plate 5'by means ofapap'er fastener 17 ofthe McGill type passing through the eyelet 16 of'the disk and the eyelet 10 ofthe backing.

' T he disks l and 15 is each provided with a series o'f-number'sranging from 1 to 10 and are secured to the eyelets 11 and 12-re'spectively in the sainemanner as that fcle scribed in connection-withthe disk 13 In connection with the dial plate 'or;backing I em'ploya'chart- 18.1 This chart is of the samesize and shape as the backing andis: provided with perforated ears or 'tabs 19, 19 corresponding to theears-{6 of the backing. The chartfhas designated thereonthe numerals 1to lainclu'sive, preferably arranged in elliptical form-near the edge ofthe chart. The chart-is -'provided with an opening 20 through which aportion 'of the disk 13 may be 'seen, an opening 21 through which a"portion of-the disk '14 may be]"observed and a window 22 by means ofwhich a numberon the disk 15 may be viewed. The window22 is providedwith ahinged shutter 23 by means of which it may be closed; The shuttermay be, secured in open or closed position in any wellknown v manner,that shown beinga well known form; of envelop fastening. I When in usethe chart is'hung in front of the'backing by passing the perforations ofthe ears 19 over the hooks 7. Thiswill 'concealflthedisl'r's- 13, 14Land 15 and the characters thereon, except those disclosed through'-theopenings' 20,- 21and22;

Each of the disks 13, llfand '15 is pro' j vided with a series ofeyelets 24;v located near its periphery. The eyeletsare locatedibetweenthe characters onthe disks and are so arranged that an eyelet will beaccessible in the openings 20, 21 and 22 respectively. When it isdesired to change the character appearing in any opening a sharp pointedinstrument, such as a pencil, may be eX- tended through the opening toengage the perforation in an eyelet and the disk may be rotatedstep-by-step until the desired character is disclosed without thenecessity of removing the chart.

In connection with the chart I provide a carrying and storage case 25.This case is preferably made in the form of an envelop and is providedwith partitions form ing a compartment 26 for the reception of charts, acompartment 27 for the disk board or backing and pockets 2'? and 28 forholding the disks.

Any number of charts 18'may be employed and the numerals carried by themmay be of any series. Separate disks 13 may carry algebraic, geometricalor other symbols, and the numbered disks 14:, 15 may contain numbers ofany series.

With the device shown in the present embodiment of my invention andarranged in the manner shown in Fig. 1 it will be seen that theappliance is to be used to facilitate problems in arithmetic, and as thesign appears inthe opening 20 it is understood that the operation is tobe addition and that, as the numeral 3 appears in the opening 21, thatnumber is to be added to some other number: Thus when. the instructorpoints to 12 the pupil will know that 3 isto be added to that number; Ifthe problem is to be one in multiplication a pencil or other pointedinstrument will be passed through the opening 20 and inserted in theopening in an eyelet in the disk 13 and the disk will be rotated untilthe sign X ap-' pears in the opening. The pupil will then know that anumber is to be multiplied by 3 and when the instructor points to anumber on the chart he will know'that that is the number tobe somultiplied. Any operation in arithmetic may be thus carried on.

' hen it is desired to change the number appearing in the opening 21,the disk 14 will be rotated as above.

Should it be desired to use a vulgar fraction as multiplier for example,the shutter 23 is opened and with the disk 15 in the.

position shown the fraction 5} will appear, and with the sign X in theopening 20 it will be understood that a number is to be multiplied byand if 8 be pointed out the answer will be 6.

In the modification shown in Fig. 5 the chart instead of having a singleseries of characters may have-a plurality of'series and in theembodiment of the invention illustrated the items of one series arearranged over the items in another series. By this arrangement and byusingthe charsame operation may be carried out in multipllcatlon ordivision.

. In accordance with the provisions of the patent statutes, I havedescribed the principle, of my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof; but Idesire to have it understood that the apparatus shown is merelyillustrative and that the invention may be carried out in other ways.Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is: 1.- An educational appliance having aback, a plurality of disks mounted .on the back and eachcarrying acharacter indicating an item of a problem, a removable chart securedto-the back, said chart carrying. a character denoting an item of theproblem, means whereby each character on the back may be viewedthroughthe chart, means carried by thechart whereby a character on a, disk maybe covered, a disk carrying a character indicating the operation to beperformed, and means for changing the operation character.

2. An educational appliance having a back, a plurality of disks mountedon the the chart having an opening whereby each character on the backmay be viewed through the chart, means carried by the chart for closingone of the openings, a disk carrying a character indicating theoperation to be performed, and means for changing the operationcharacter. 3. An educational appliance having a back, a disk rotatablycarried on the back, a series of characters each indicating an item of aproblem carried on the disk, a chart removably carried on the back, saidchart having a character denotinganot-her item'of the problem, said diskhaving a perforation whereby it may be rotated, there being an openingin the chart for disclosing a single character, and a perforation.

4.1811 educational appliance having .a back, a disk rotatably carried onthe back, a series of characters each indicating an. item' of a problemcarried on the disk, a chart removably carried on the back, said'charthaving a series of characters each denoting another item of the problem,said disk haviie closing a single character on the disk'and aperforation. i

5. An educational appliance having a back, a disk rotatably carried onthe back, a series of characters each indicating anitem of a problemcarried: on the disk, a chart removably carried on the backfsaidcharthaving a series of characters each denoting another item of theproblem, saiddisk having an cyeleted perforation whereby it may berotated, there being an opening in the chart for disclosing a singlecharacter and a perforation in the disk.

6. An educational appliance having a back, a disk-rotatably carried onthe back, a series of characters each indicating an item of a problemcarried on the disk, a chart removably carried on the back, said charthaving a character denoting another item of the problem, said diskhaving an oyeleted perforation whereby it may be rotated, there being anopening in the chart for disclosing a single character'on the disk and aperforation.

7. An educational appliance having a back, a disk rotatably carried onthe back, a series of characters each indicating an item of a problemcarried on the disk, a chart removably carried on the back, said charthaving a character denoting another item of the problem, said charthaving an opening for disclosing a single character on the disk, therebeinga perforation in the disk accessible through the opening forrotating the disk.

8. An educational appliance having a back, a disk rotatably carried onthe back, a series of characters each indicating an item of a problemcarried on the disk, a chart removably carried on the back, said charthaving a series of characters each denoting another item of the problem,there being an opening in the chart for disclosing a single character onthe disk, there being a perforation in the disk accessible through theopening for rotating the disk.

9. An educational appliance having a back, a disk rotatably carried onthe back, a series of characters each indicating an item of a problemcarried on the disk, a chart removably carried on the back, said charthaving a character denoting another item of the problem, there being anopenmg in the chart for-disclosing a single character on the disk, therebeing an eyeleted perforation in the disk accessible through the openingfor rotating the disk.

10. An educational appliance having a back, a disk rotatably carried onthe back, a series of characters each indicating an item of a problemcarried on the disk, a chart removably carried on the back, said charthaving a series of characters each denoting another item of the problem,there being an opening in the chart'for disclosing a single to beremovably carried'on the back, there being openings in each chart eachdisclosmg a character on the disk, means for rotating the disks, meansfor closing one of the openings, a disk carrying a series of symbolsindicating various operations, there being anopening in each chart fordisclosingan operation symbol, and means for rotating theoperation'disk. v

12. An educational appliance having a back, a dial containingmathematical symbols rotatably mounted on the back, a dial containingnumbersrotatably mounted on the back, a second dial carrying numbersrotatably mounted on the back, means for supporting the back, hookscarried by the back, a plurality of charts each having a differentseries of characters and adapted to be removably supported by the hooks,there being an opening in each chart fordisclosing a symbol on thesymbol dial, there being an opening in each chart for disclosing anumber on the first number dial, there being an opening in each chartfor disclosing the second number dial, a flap on each chart for closingthe latter opening, and eyelets in the dials between the characterscarried thereon for rotating the dials.

v 13. An educational appliance having a back, a dial containingmathematical symbols rotatably mounted on the back, a dial containingnumbers rotatably mounted on the back, a second dial carrying numbersrotatably mounted on the back, means for supporting the back, hookscarried by the back, a plurality of charts eachhaving a diiferentseries, of characters and adapted to be removably supported by thehooks, there being an opening in each chart for disclosing a ice symbolon the symbol dial, there being an opening in each chart for disclosinga number on the first number dial, there being an opening in each chartfor disclosing the second number dial, a flap on each chart for closingthe latter opening, eyelets in the dials between the characters carriedthereon for rotating the dials, and a casing having separatecompartments for receiving the backing, a plurality of charts and aplurality I problem, a chart carried by the back, said chart carrying acharacter denoting an item of a problem, means whereby a character onthe disk may be viewed through the chart, means whereby the character onthe disk may be hidden, a disk carrying a character indicating theoperation to be performed, and means for changing the operationcharacter.

15. An educational appliance having a back, a disk mounted on the back,said disk having a character indicating an item of a problem, a chartcarried by the back said disk being covered by the chart, said chartcarrying a character denoting an item of a problem, means whereby acharacter on the disk may be viewed through the chart, means whereby thecharacter on the disk may be hidden, means accessible from outside thechart for rotating the disk a disk carrying a character indicating theopera tion to be performed, and means for changing the operationcharacter.

This specification signed and witnessed this 27 day of Oct, 1915.

ANNA TAYLOR MOCLUEE. Witnesses:

EMMA J. GnnaBIN, MAUDE MALEY.

Copies 01 this patent may be obtained for five cents each; by addressingthe Commissioner of Patents,

Washington, D. C.

